media: via-camera: convert to the vb2 framework

Convert the via-camera to the vb2 framework. With this change this
driver passes all 'v4l2-compliance -s' tests on my OLPC 1.5.

Also tested with the Sugar 'Record' application.

All tests were done under the OLPC official 5.0.8 kernel.
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/Kconfig

@@ -16,7 +16,7 @@ source "drivers/media/platform/marvell-ccic/Kconfig"
 config VIDEO_VIA_CAMERA
 	tristate "VIAFB camera controller support"
 	depends on FB_VIA
-	select VIDEOBUF_DMA_SG
+	select VIDEOBUF2_DMA_SG
 	select VIDEO_OV7670
 	help
 	   Driver support for the integrated camera controller in VIA